14K Yellow Gold .28ct Cabochon Cat's Eye Alexandrite & .02ct Diamond Ring Size 7

14K Yellow Gold

Gemstone Weight: (1) Oval Cut Cabochon Cat's Eye Alexandrite

Diamond Weight: (2) Round Cut Diamonds equaling .02 Carats F-G Color SI1 Clarity

Size: 7

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Some Alexandrite will display ‘chatoyancy’. This phenomenon, named after the French ‘oeil de chat’, meaning ’cat’s eye’, is a stunning, mysterious looking effect, prized by many collectors. A single band of light crosses the top of the gem, appearing to magically open and close as the gem is turned in the light.

Chatoyancy is caused by light reflecting off the thin parallel inclusions within a gem, known as ‘silk’. These inclusions can be hollow tubes, or other structures aligned in one direction. The effect is created at 90° to these. The best analogy is picturing a spool of silk thread and the light reflecting in a band from the surface.

Only a small proportion of gemstones can display a strong chatoyancy and they must be carefully cut en cabochon in the right orientation to show off the effect.
These days, although there are a few more locations where this gem is found, it is still so rare that many jewelers won’t ever have seen one. The addition of the Cats Eye effect makes Cats Eye Alexandrite doubly rare.